package com.itheima.service;

import com.alibaba.dubbo.config.annotation.Reference;
import com.itheima.pojo.Permission;
import com.itheima.pojo.Role;
import com.itheima.pojo.User;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

/**
 * @author xiaycbstart
 * @create 2019 12 30 10:02
 * 类交给spring容器识别
 * 类中方法由springSecurity框架自动调用
 * 查找数据库认证并授予权限,同时校验密码正确性
 */
@Component
public class SpringSecurityUserService implements UserDetailsService {
    @Reference
    private UserService userService;
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        User user = userService.findByUsername(username);
        if(user==null){
            return null;
        }
        Set<Role> roles = user.getRoles();
        List<GrantedAuthority> list = new ArrayList<>();
        for (Role role : roles) {
            //开始授权
            list.add(new SimpleGrantedAuthority(role.getKeyword()));
            Set<Permission> permissions = role.getPermissions();
            for (Permission permission : permissions) {
                list.add(new SimpleGrantedAuthority(permission.getKeyword()));
            }
        }
        return  new org.springframework.security.core.userdetails.User(username, user.getPassword(), list);
    }
}
